I am going to do a rescape on my 60 gallon soon, so since I have green spot algae on my acrylic tank wall(inner back), mind as well remove it while maintenance
For short term removal, yes just scrub it off.
To get rid of it for good we need to know more about your setup...
Size?
Stock?
Lighting? (type and time)?
Ferts?
Co2?
For starters.
I use a sharp razor blade....nothing stands a chance...